CVE-2024-10855

Image Optimizer, Resizer and CDN – Sirv <= 7.3.0 - Missing Authorization to Authenticated (Contributor+) Arbitrary Option Deletion

2024-11-19 00:00
Arkadiusz Hydzik

Strategic Overview

Status
Patched in 7.3.1
Affected Plugin
Image Optimizer, Resizer and CDN – Sirv
Affected Version
<= 7.3.0
CVSS
8.1High
Weakness type
CWE-639 · Authorization Bypass Through User-Controlled Key
CVE
CVE-2024-10855
View all Image Optimizer, Resizer and CDN – Sirv vulnerabilities

At a glance

CVE-2024-10855 is a high-severity Authorization Bypass Through User-Controlled Key vulnerability in the Image Optimizer, Resizer and CDN WordPress plugin, affecting versions <= 7.3.0. It carries a CVSS score of 8.1 (reachable over the network; low attack complexity; high integrity, availability impact). Exploitation requires an authenticated account at Contributor level or above. The issue is fixed in version 7.3.1; sites on affected versions should update now. Disclosed November 2024, reported by Arkadiusz Hydzik.

Vulnerability Overview

The Image Optimizer, Resizer and CDN – Sirv plugin for WordPress is vulnerable to unauthorized modification of data that can lead to a denial of service due to insufficient validation on the filename parameter of the sirv_upload_file_by_chunks() function and lack of in all versions up to, and including, 7.3.0. This makes it possible for authenticated attackers, with Contributor-level access and above, to delete arbitrary option values on the WordPress site. This can be leveraged to delete an option that would create an error on the site and deny service to legitimate users.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on integrity, availability.

CWE-639: Authorization Bypass Through User-Controlled Key

Image Optimizer, Resizer and CDN <= 7.3.0 carries this weakness at sirv_upload_file_by_chunks(), and reaching it takes an account at Contributor level or above. Authorization bypass through a user-controlled key, often called insecure direct object reference, means the application looks up a record by an identifier from the request without checking that the caller owns it.

Changing a number in the request is enough to read or modify other users' records, which on commerce and membership sites means customer data. For Image Optimizer, Resizer and CDN the fix is 7.3.1: builds <= 7.3.0 are affected, anything from 7.3.1 onward is not.

Remediation

Update to version 7.3.1, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Image Optimizer, Resizer and CDN 7.3.1 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2024-10855https://www.wordfence.com/threat-intel/vulnerabilities/id/d6ec09e5-4994-4d23-bf8e-26b64d5303fahttps://nvd.nist.gov/vuln/detail/CVE-2024-10855

Related records

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